/*
 * Copyright (c) 2023 by Kang Wang. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.egolessness.destino.registration.countable;

import org.egolessness.destino.registration.RegistrationFilter;
import com.google.inject.Inject;
import org.egolessness.destino.core.enumration.Action;
import org.egolessness.destino.core.fixedness.Countable;
import org.egolessness.destino.registration.publisher.ServicePublisher;

import java.util.LinkedList;

public class SubscribedServicesCountable implements Countable {

    private final ServicePublisher servicePublisher;

    private final RegistrationFilter registrationFilter;

    @Inject
    public SubscribedServicesCountable(ServicePublisher servicePublisher, RegistrationFilter registrationFilter) {
        this.servicePublisher = servicePublisher;
        this.registrationFilter = registrationFilter;
    }

    @Override
    public String getKey() {
        return "subscribed_services";
    }

    @Override
    public long getValue() {
        boolean hasPermission = registrationFilter.doDeepFilter(Action.READ, new LinkedList<>());
        if (!hasPermission) {
            return -1;
        }
        return servicePublisher.subscribedServices();
    }

}
